Cities Quotes - Page 80
Peter Drucker (2013). “People and Performance”, p.290, Routledge
Percy Bysshe Shelley (1853). “The Poetical Works of Percy Bysshe Shelley: Complete in One Volume”, p.544
Pablo Neruda (1990). “Selected Poems”, p.129, Houghton Mifflin Harcourt
"Hoyt's New Cyclopedia Of Practical Quotations" by Jehiel Keeler Hoyt, p. 686-88, The Bee, No, IV. A City Night-Piece, 1922.